520066900 has 18 divisors (see below), whose sum is σ = 1128545390. Its totient is φ = 208026720.

The previous prime is 520066861. The next prime is 520066909. The reversal of 520066900 is 9660025.

It can be written as a sum of positive squares in 3 ways, for example, as 318096 + 519748804 = 564^2 + 22798^2 .

It is a super-2 number, since 2×520066900² = 540939160951220000, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (520066909) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2600235 + ... + 2600434.

Almost surely, 2^520066900 is an apocalyptic number.

520066900 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

520066900 is an abundant number, since it is smaller than the sum of its proper divisors (608478490).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

520066900 is a wasteful number, since it uses less digits than its factorization.

520066900 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5200683 (or 5200676 counting only the distinct ones).

The product of its (nonzero) digits is 3240, while the sum is 28.

The square root of 520066900 is about 22804.9753343432. The cubic root of 520066900 is about 804.1796356946.

The spelling of 520066900 in words is "five hundred twenty million, sixty-six thousand, nine hundred".